summaryrefslogtreecommitdiffstats
path: root/storage/mozStorageStatementJSHelper.cpp
blob: a715c1371c7684bd60f31703b4c6d6c5ba09caed (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsIXPConnect.h"
#include "mozStorageStatement.h"
#include "mozStorageService.h"

#include "nsMemory.h"
#include "nsString.h"
#include "nsServiceManagerUtils.h"

#include "mozStorageStatementJSHelper.h"

#include "mozStorageStatementRow.h"
#include "mozStorageStatementParams.h"

#include "jsapi.h"
#include "js/Value.h"

#include "xpc_make_class.h"

namespace mozilla {
namespace storage {

////////////////////////////////////////////////////////////////////////////////
//// Global Functions

static bool stepFunc(JSContext* aCtx, uint32_t argc, JS::Value* _vp) {
  JS::CallArgs args = CallArgsFromVp(argc, _vp);

  nsCOMPtr<nsIXPConnect> xpc(nsIXPConnect::XPConnect());
  nsCOMPtr<nsIXPConnectWrappedNative> wrapper;

  if (!args.thisv().isObject()) {
    ::JS_ReportErrorASCII(aCtx, "mozIStorageStatement::step() requires object");
    return false;
  }

  JS::RootedObject obj(aCtx, &args.thisv().toObject());
  nsresult rv =
      xpc->GetWrappedNativeOfJSObject(aCtx, obj, getter_AddRefs(wrapper));
  if (NS_FAILED(rv)) {
    ::JS_ReportErrorASCII(
        aCtx, "mozIStorageStatement::step() could not obtain native statement");
    return false;
  }

#ifdef DEBUG
  {
    nsCOMPtr<mozIStorageStatement> isStatement(
        do_QueryInterface(wrapper->Native()));
    NS_ASSERTION(isStatement, "How is this not a statement?!");
  }
#endif

  Statement* stmt = static_cast<Statement*>(
      static_cast<mozIStorageStatement*>(wrapper->Native()));

  bool hasMore = false;
  rv = stmt->ExecuteStep(&hasMore);
  if (NS_SUCCEEDED(rv) && !hasMore) {
    args.rval().setBoolean(false);
    (void)stmt->Reset();
    return true;
  }

  if (NS_FAILED(rv)) {
    ::JS_ReportErrorASCII(aCtx,
                          "mozIStorageStatement::step() returned an error");
    return false;
  }

  args.rval().setBoolean(hasMore);
  return true;
}

////////////////////////////////////////////////////////////////////////////////
//// StatementJSHelper

nsresult StatementJSHelper::getRow(Statement* aStatement, JSContext* aCtx,
                                   JSObject* aScopeObj, JS::Value* _row) {
  MOZ_ASSERT(NS_IsMainThread());

#ifdef DEBUG
  int32_t state;
  (void)aStatement->GetState(&state);
  NS_ASSERTION(state == mozIStorageStatement::MOZ_STORAGE_STATEMENT_EXECUTING,
               "Invalid state to get the row object - all calls will fail!");
#endif

  JS::RootedObject scope(aCtx, aScopeObj);

  if (!aStatement->mStatementRowHolder) {
    dom::GlobalObject global(aCtx, scope);
    if (global.Failed()) {
      return NS_ERROR_UNEXPECTED;
    }

    nsCOMPtr<nsPIDOMWindowInner> window =
        do_QueryInterface(global.GetAsSupports());

    RefPtr<StatementRow> row(new StatementRow(window, aStatement));
    NS_ENSURE_TRUE(row, NS_ERROR_OUT_OF_MEMORY);

    RefPtr<StatementRowHolder> rowHolder = new StatementRowHolder(row);
    NS_ENSURE_TRUE(rowHolder, NS_ERROR_OUT_OF_MEMORY);

    aStatement->mStatementRowHolder =
        new nsMainThreadPtrHolder<StatementRowHolder>(
            "Statement::mStatementRowHolder", rowHolder);
  }

  RefPtr<StatementRow> row(aStatement->mStatementRowHolder->Get());
  JSObject* obj = row->WrapObject(aCtx, nullptr);
  if (!obj) {
    return NS_ERROR_UNEXPECTED;
  }

  _row->setObject(*obj);
  return NS_OK;
}

nsresult StatementJSHelper::getParams(Statement* aStatement, JSContext* aCtx,
                                      JSObject* aScopeObj, JS::Value* _params) {
  MOZ_ASSERT(NS_IsMainThread());

#ifdef DEBUG
  int32_t state;
  (void)aStatement->GetState(&state);
  NS_ASSERTION(state == mozIStorageStatement::MOZ_STORAGE_STATEMENT_READY,
               "Invalid state to get the params object - all calls will fail!");
#endif

  JS::RootedObject scope(aCtx, aScopeObj);

  if (!aStatement->mStatementParamsHolder) {
    dom::GlobalObject global(aCtx, scope);
    if (global.Failed()) {
      return NS_ERROR_UNEXPECTED;
    }

    nsCOMPtr<nsPIDOMWindowInner> window =
        do_QueryInterface(global.GetAsSupports());

    RefPtr<StatementParams> params(new StatementParams(window, aStatement));
    NS_ENSURE_TRUE(params, NS_ERROR_OUT_OF_MEMORY);

    RefPtr<StatementParamsHolder> paramsHolder =
        new StatementParamsHolder(params);
    NS_ENSURE_TRUE(paramsHolder, NS_ERROR_OUT_OF_MEMORY);

    aStatement->mStatementParamsHolder =
        new nsMainThreadPtrHolder<StatementParamsHolder>(
            "Statement::mStatementParamsHolder", paramsHolder);
  }

  RefPtr<StatementParams> params(aStatement->mStatementParamsHolder->Get());
  JSObject* obj = params->WrapObject(aCtx, nullptr);
  if (!obj) {
    return NS_ERROR_UNEXPECTED;
  }

  _params->setObject(*obj);
  return NS_OK;
}

NS_IMETHODIMP_(MozExternalRefCountType) StatementJSHelper::AddRef() {
  return 2;
}
NS_IMETHODIMP_(MozExternalRefCountType) StatementJSHelper::Release() {
  return 1;
}
NS_INTERFACE_MAP_BEGIN(StatementJSHelper)
  NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END

////////////////////////////////////////////////////////////////////////////////
//// nsIXPCScriptable

#define XPC_MAP_CLASSNAME StatementJSHelper
#define XPC_MAP_QUOTED_CLASSNAME "StatementJSHelper"
#define XPC_MAP_FLAGS \
  (XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE)
#include "xpc_map_end.h"

NS_IMETHODIMP
StatementJSHelper::Resolve(nsIXPConnectWrappedNative* aWrapper, JSContext* aCtx,
                           JSObject* aScopeObj, jsid aId, bool* aResolvedp,
                           bool* _retval) {
  if (!JSID_IS_STRING(aId)) return NS_OK;

  JS::Rooted<JSObject*> scope(aCtx, aScopeObj);
  JS::Rooted<jsid> id(aCtx, aId);

#ifdef DEBUG
  {
    nsCOMPtr<mozIStorageStatement> isStatement(
        do_QueryInterface(aWrapper->Native()));
    NS_ASSERTION(isStatement, "How is this not a statement?!");
  }
#endif

  Statement* stmt = static_cast<Statement*>(
      static_cast<mozIStorageStatement*>(aWrapper->Native()));

  JSLinearString* str = JSID_TO_LINEAR_STRING(id);
  if (::JS_LinearStringEqualsLiteral(str, "step")) {
    *_retval = ::JS_DefineFunction(aCtx, scope, "step", stepFunc, 0,
                                   JSPROP_RESOLVING) != nullptr;
    *aResolvedp = true;
    return NS_OK;
  }

  JS::RootedValue val(aCtx);

  if (::JS_LinearStringEqualsLiteral(str, "row")) {
    nsresult rv = getRow(stmt, aCtx, scope, val.address());
    NS_ENSURE_SUCCESS(rv, rv);
    *_retval = ::JS_DefinePropertyById(aCtx, scope, id, val, JSPROP_RESOLVING);
    *aResolvedp = true;
    return NS_OK;
  }

  if (::JS_LinearStringEqualsLiteral(str, "params")) {
    nsresult rv = getParams(stmt, aCtx, scope, val.address());
    NS_ENSURE_SUCCESS(rv, rv);
    *_retval = ::JS_DefinePropertyById(aCtx, scope, id, val, JSPROP_RESOLVING);
    *aResolvedp = true;
    return NS_OK;
  }

  return NS_OK;
}

NS_IMPL_ISUPPORTS0(StatementParamsHolder);

StatementParamsHolder::~StatementParamsHolder() {
  MOZ_ASSERT(NS_IsMainThread());
  // We are considered dead at this point, so any wrappers for row or params
  // need to lose their reference to the statement.
  mParams->mStatement = nullptr;
}

NS_IMPL_ISUPPORTS0(StatementRowHolder);

StatementRowHolder::~StatementRowHolder() {
  MOZ_ASSERT(NS_IsMainThread());
  // We are considered dead at this point, so any wrappers for row or params
  // need to lose their reference to the statement.
  mRow->mStatement = nullptr;
}

}  // namespace storage
}  // namespace mozilla